US4690998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Special epoxy resins
Assignee: Bayer AG
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Filing: 1986-02-14
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Granted: 1987-09-01
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Expires: 2006-02-14
Abstract
Abstract The invention relates to epxoy resins obtained by reaction of epichlorohydrin with selected mixtures of phenols for the production of thermosetting and cold-hardening moldings, coating compositions and adhesive compositions.
Inventors
- 👤 Bernd Wahle
- 👤 Dieter Freitag
- 👤 Walter Uerdingen
- 👤 Heinrich Heine
- 👤 Manfred Blazejak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:27
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/24; C08G59/245; C08G59/02; C08G59/04; C08G59/06; C08G59/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
20 words
An epoxy resin which is the reaction product of epichlorohydrin and a phenolic mixture wherein the phenolic mixture is: ##STR2##
Claim 2
Dependent Claim
20 words
An epoxy resin which is the reaction product of epichlorohydrin and a phenolic mixture wherein the phenolic mixture is: ##STR2##
References Cited (Backward Citations)
US602789A
Cited
GB814695A
Cited
US3384617A
Cited
US3422063A
Cited
US3767618A
Cited
FR2322161A1
Cited
DE2901665A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-31 | 1991-03-02 | 1991-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-31 | 1995-03-02 | 1995-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-31 | 1999-03-02 | 1999-09-01 | $7700.00 | Window Closed / Lapsed |